Retribution - Part 1

When PJ's old nemesis Luke Darcy (see season 4's ""The Civil Dead"") is freed from jail, he returns to Mount Thomas and PJ instantly believes he is bad news. After a bashing, and then the rape of Luke's own grandmother, the evidence points elswhere but PJ's suspicions - and the suspicions of Luke's cousin - lead him to force his anger onto Luke. Meanwhile, Susie and Ben - who have each spent months in therapy - talk about their issue and Susie begins to think Ben is ignoring it, rather than confronting his feelings about killing her husband. After Luke attempts to rape and kill Jo, PJ angrily heads to his house. When the others arrive they find Luke dead with an axe in the head - and PJ standing over him...